The calculated distance (air line) between Néa Michanióna and Néa Smýrni is approximately 180 miles respectively 290 kilometers.
By car or train, the actual journey to Néa Smýrni is certainly longer, as only the direct route (as the crow flies) between Néa Michanióna and Néa Smýrni has been calculated here.
Air line (approximately)
290 kilometers
156 nautical miles